(1)(a) Each comprehensive land use plan and development regulations shall be subject to continuing review and evaluation by the county or city that adopted them. Except as otherwise provided, a county or city shall take legislative action to review and, if needed, revise its comprehensive land use plan and development regulations to ensure the plan and regulations comply with the requirements of this chapter according to the deadlines in subsections (4) and (5) of this section.

(b) Except as otherwise provided, a county or city not planning under RCW 36.70A.040 shall take action to review and, if needed, revise its policies and development regulations regarding critical areas and natural resource lands adopted according to this chapter to ensure these policies and regulations comply with the requirements of this chapter according to the deadlines in subsections (4) and (5) of this section. Legislative action means the adoption of a resolution or ordinance following notice and a public hearing indicating at a minimum, a finding that a review and evaluation has occurred and identifying the revisions made, or that a revision was not needed and the reasons therefor.

(c) The review and evaluation required by this subsection shall include, but is not limited to, consideration of critical area ordinances and, if planning under RCW 36.70A.040, an analysis of the population allocated to a city or county from the most recent ten-year population forecast by the office of financial management.

(d) Any amendment of or revision to a comprehensive land use plan shall conform to this chapter. Any amendment of or revision to development regulations shall be consistent with and implement the comprehensive plan.

(2)(a) Each county and city shall establish and broadly disseminate to the public a public participation program consistent with RCW 36.70A.035 and 36.70A.140 that identifies procedures and schedules whereby updates, proposed amendments, or revisions of the comprehensive plan are considered by the governing body of the county or city no more frequently than once every year. "Updates" means to review and revise, if needed, according to subsection (1) of this section, and the deadlines in subsections (4) and (5) of this section or in accordance with the provisions of subsection (6) of this section. Amendments may be considered more frequently than once per year under the following circumstances:

(i) The initial adoption of a subarea plan. Subarea plans adopted under this subsection (2)(a)(i) must clarify, supplement, or implement jurisdiction-wide comprehensive plan policies, and may only be adopted if the cumulative impacts of the proposed plan are addressed by appropriate environmental review under chapter 43.21C RCW;

(ii) The development of an initial subarea plan for economic development located outside of the one hundred year floodplain in a county that has completed a state-funded pilot project that is based on watershed characterization and local habitat assessment;

(iv) The amendment of the capital facilities element of a comprehensive plan that occurs concurrently with the adoption or amendment of a county or city budget; or

(v) The adoption of comprehensive plan amendments necessary to enact a planned action under RCW 43.21C.440, provided that amendments are considered in accordance with the public participation program established by the county or city under this subsection (2)(a) and all persons who have requested notice of a comprehensive plan update are given notice of the amendments and an opportunity to comment.

(b) Except as otherwise provided in (a) of this subsection, all proposals shall be considered by the governing body concurrently so the cumulative effect of the various proposals can be ascertained. However, after appropriate public participation a county or city may adopt amendments or revisions to its comprehensive plan that conform with this chapter whenever an emergency exists or to resolve an appeal of a comprehensive plan filed with the growth management hearings board or with the court.

(3)(a) Each county that designates urban growth areas under RCW 36.70A.110 shall review, according to the schedules established in subsections (4) and (5) of this section, its designated urban growth area or areas, patterns of development occurring within the urban growth area or areas, and the densities permitted within both the incorporated and unincorporated portions of each urban growth area. In conjunction with this review by the county, each city located within an urban growth area shall review the densities permitted within its boundaries, and the extent to which the urban growth occurring within the county has located within each city and the unincorporated portions of the urban growth areas.

(b) The county comprehensive plan designating urban growth areas, and the densities permitted in the urban growth areas by the comprehensive plans of the county and each city located within the urban growth areas, shall be revised to accommodate the urban growth projected to occur in the county for the succeeding twenty-year period. The review required by this subsection may be combined with the review and evaluation required by RCW 36.70A.215.

(c) If, during the county's review under (a) of this subsection, the county determines revision of the urban growth area is not required to accommodate the urban growth projected to occur in the county for the succeeding 20-year period, but does determine that patterns of development have created pressure in areas that exceed available, developable lands within the urban growth area, the urban growth area or areas may be revised to accommodate identified patterns of development and likely future development pressure for the succeeding 20-year period, but may not result in an increase in the total surface areas of the urban growth area or areas.

(4) Except as otherwise provided in subsections (6) and (8) of this section, counties and cities shall take action to review and, if needed, revise their comprehensive plans and development regulations to ensure the plan and regulations comply with the requirements of this chapter as follows:

(b) On or before June 30, 2016, for Clallam, Clark, Island, Jefferson, Kitsap, Mason, San Juan, Skagit, Thurston, and Whatcom counties and the cities within those counties;

(c) On or before June 30, 2017, for Benton, Chelan, Cowlitz, Douglas, Kittitas, Lewis, Skamania, Spokane, and Yakima counties and the cities within those counties; and

(d) On or before June 30, 2018, for Adams, Asotin, Columbia, Ferry, Franklin, Garfield, Grant, Grays Harbor, Klickitat, Lincoln, Okanogan, Pacific, Pend Oreille, Stevens, Wahkiakum, Walla Walla, and Whitman counties and the cities within those counties.

(5) Except as otherwise provided in subsections (6) and (8) of this section, following the review of comprehensive plans and development regulations required by subsection (4) of this section, counties and cities shall take action to review and, if needed, revise their comprehensive plans and development regulations to ensure the plan and regulations comply with the requirements of this chapter as follows:

(a) On or before June 30, 2024, and every eight years thereafter, for King, Kitsap, Pierce, and Snohomish counties and the cities within those counties;

(b) On or before June 30, 2025, and every eight years thereafter, for Clallam, Clark, Island, Jefferson, Lewis, Mason, San Juan, Skagit, Thurston, and Whatcom counties and the cities within those counties;

(c) On or before June 30, 2026, and every eight years thereafter, for Benton, Chelan, Cowlitz, Douglas, Franklin, Kittitas, Skamania, Spokane, Walla Walla, and Yakima counties and the cities within those counties; and

(d) On or before June 30, 2027, and every eight years thereafter, for Adams, Asotin, Columbia, Ferry, Garfield, Grant, Grays Harbor, Klickitat, Lincoln, Okanogan, Pacific, Pend Oreille, Stevens, Wahkiakum, and Whitman counties and the cities within those counties.

(6)(a) Nothing in this section precludes a county or city from conducting the review and evaluation required by this section before the deadlines established in subsections (4) and (5) of this section. Counties and cities may begin this process early and may be eligible for grants from the department, subject to available funding, if they elect to do so.

(b) A county that is subject to a deadline established in subsection (5)(a)(ii) through (iv) [(b) through (d)] of this section and meets the following criteria may comply with the requirements of this section at any time within the twenty-four months following the deadline established in subsection (5) of this section: The county has a population of less than fifty thousand and has had its population increase by no more than seventeen percent in the ten years preceding the deadline established in subsection (5) of this section as of that date.

(c) A city that is subject to a deadline established in subsection (5)(a)(ii) through (iv) [(b) through (d)] of this section and meets the following criteria may comply with the requirements of this section at any time within the twenty-four months following the deadline established in subsection (5) of this section: The city has a population of no more than five thousand and has had its population increase by the greater of either no more than one hundred persons or no more than seventeen percent in the ten years preceding the deadline established in subsection (5) of this section as of that date.

(d) State agencies are encouraged to provide technical assistance to the counties and cities in the review of critical area ordinances, comprehensive plans, and development regulations.

(7)(a) The requirements imposed on counties and cities under this section shall be considered "requirements of this chapter" under the terms of RCW 36.70A.040(1). Only those counties and cities that meet the following criteria may receive grants, loans, pledges, or financial guarantees under chapter 43.155 or 70A.135 RCW:

(ii) Demonstrating substantial progress towards compliance with the schedules in this section for development regulations that protect critical areas.

(b) A county or city that is fewer than twelve months out of compliance with the schedules in this section for development regulations that protect critical areas is making substantial progress towards compliance. Only those counties and cities in compliance with the schedules in this section may receive preference for grants or loans subject to the provisions of RCW 43.17.250.

(8)(a) Except as otherwise provided in (c) of this subsection, if a participating watershed is achieving benchmarks and goals for the protection of critical areas functions and values, the county is not required to update development regulations to protect critical areas as they specifically apply to agricultural activities in that watershed.

(b) A county that has made the election under RCW 36.70A.710(1) may only adopt or amend development regulations to protect critical areas as they specifically apply to agricultural activities in a participating watershed if:

(ii) The local watershed group for that watershed has requested the county to adopt or amend development regulations as part of a work plan developed under RCW 36.70A.720;

(iii) The adoption or amendment of the development regulations is necessary to enable the county to respond to an order of the growth management hearings board or court;

(c) Beginning ten years from the date of receipt of funding, a county that has made the election under RCW 36.70A.710(1) must review and, if necessary, revise development regulations to protect critical areas as they specifically apply to agricultural activities in a participating watershed in accordance with the review and revision requirements and timeline in subsection (5) of this section. This subsection (8)(c) does not apply to a participating watershed that has determined under RCW 36.70A.720(2)(c)(ii) that the watershed's goals and benchmarks for protection have been met.